So President Donald Trump is still planning to build that wall, it's going to be a big wall, and he wants to make Mexico, scratch that, the American consumer, pay for it.

The proposed wall, which started as a giant insult but will now be a physical barrier along the U.S. and Mexico border, is going to cost a huge amount of money: $12 to $15 billion. Trump has repeatedly said he will make Mexico fund it and on Thursday afternoon his administration floated a less direct idea: a 20 percent tax on imports from Mexico.

If that tax were imposed, it would be way more difficult — and way more expensive for regular Americans — to get Mexican imports, among other potential problems. According to the U.S. Trade Representative website, Mexico was "the third largest supplier of goods imported in 2015."

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